#include<bits/stdc++.h>
using namespace std;
const int N = 20;
int n, m, a[N], b[N];
void sub1() {
bool ok = false;
for (int s = 1; s < (1 << m); ++s) {
int sum = 0;
for (int i = 0; i < m; ++i) {
if (s >> i & 1) sum += b[i];
}
ok |= sum == a[0];
}
cout << (ok ? "YES" : "NO");
}
void sub2() {
bool good = false;
do {
bool ok = true;
for (int i = 0, j = 0; i < n; ++i) {
int sum = 0;
while (j < m && sum < a[i]) {
sum += b[j];
j += 1;
}
ok &= sum == a[i];
}
good |= ok;
if (good) break;
} while (next_permutation(b, b + m));
cout << (good ? "YES": "NO");
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
for (int i = 0; i < n; ++i) cin >> a[i];
for (int i = 0; i < m; ++i) cin >> b[i];
sub2();
}
